Hello, how come each day I launch Arduino application on my Mac, I get "Update available for some of your boards and libraries"? Even I have updated, this message keeps showing up even on the same day? I don't think there are so many daily updates.
When you do Sketch > Include Library > Manage Libraries... > Type: Updatable and Tools > Board > Boards Manager > Type: Updatable do any entries appear? If so you need to update to the latest version of all entries to no longer receive the notification. You can also disable the notification by File > Preferences > Check for updates on startup.
Go to Tools->Board->Board Manager then choose updateable for type and update all the returned packages.